Tax troubles

Yes, I was all set to spend 40 good ones on a custom plate for my cool new ride, my much prized MINI .And so I spent a good part of the week making up 6 space alphanumeric combinations that would be cool , fun and hip ....in other words me ;).
Well, all that came to naught. My well laid plans fell apart very quickly once I discovered that Bush country charges 6.25% of the car price as sales tax for registering the vehicle or doing a title transfer.Yes, even on used cars bought from private owners.And incase anyone has the bright idea of marking the purchase price down ,it doesn't really help.These nasty buggers have devised a system of estimating the car value by year and mileage and they do not allow the price to be marked below 80% of that value for the purpose of calculating tax . Can you blame a girl for being too upset to forget about niceties like custom plates when being hit with an unexpected tax bill of over a grand?
Grrr....